磕头如捣蒜
kē​tóu​rú​dǎo​suàn

to kowtow like a pestle pounding garlic

  1. 磕头 磕頭 kē​tóu
    to kowtow
    to kneel and touch one's forehead to the ground as a sign of deep respect, traditionally used for elders or superiors
  2. 如 rú preposition
    to be like
    to be like; to be similar to; as if
  3. 捣蒜 搗蒜 dǎo​suàn
    to do rapidly
    To perform an action repeatedly and rapidly, particularly used to describe knocking one's head on the ground while kowtowing.